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Because 'imagejpeg', 'imagegif' and 'imagepng' has their own parameters especially quality value, following function is required if you want to customize quality value. private function write_image($new_img, $new_file_path, $write_image){ if($write_image == 'imagepng'){ return $write_image($new_img, $new_file_path, 0); }else if($write_image == 'imagegif'){ return $write_image($new_img, $new_file_path); }else{ return $write_image($new_img, $new_file_path, 100); } } |
http://php.net/manual/en/function.imagepng.php